You may have been charged for your Grammarly subscription more than last time if you initially subscribed at a discounted rate and your subscription later renewed at a standard rate. Grammarly’s promo offers are valid for one subscription period only.
If you purchased a Grammarly Pro subscription for yourself at a discounted rate and later added more members, additional seats will be billed at a standard rate. Grammarly’s promotional offers are only valid for the first seat on Grammarly Pro plans.